世界核地质科学2025，Vol.42Issue(2)：291-306,16.
纳米比亚罗辛矿区铀成矿潜力评价
Evaluation of uranium metallogenic potential in Rössing mining area,Namibia
摘要
Abstract
The Rössing mine in Namibia is the earliest alaskite-type uranium mine,ranking the top 10 globe uranium mines.However,the backup resources are seriously insufficient,therefore it is urgent to carry out exploration to expand resources and ensure the sustainable development of the mine.Based on the secondary data development,the authors carried out field geological survey,large-scale geological mapping,and ground energy spectrum measurement on the main uranium deposits in the mining area,studied the typical uranium deposit and identified uranium mineralization characteristics and ore-controlling factors.It was considered that the alaskite-type uranium deposit was the products of regional tectonic-magmatic evolution,which was crystallized from granitic magma.The ore-forming material was derived from the anatexis of the ancient basement rocks.The diversity of source rocks and the heterogeneity of melting resulted in the capacity variations in the ore-bearing alaskite.The localization of the deposit is controlled by NNE-trending regional faults,dome(fold)turning ends and structural variation sites.Ore-bearing pluton intruded along the structural and weak stratigraphic planes,with post-mineralization hydrothermal alteration and supergene leaching and enrichment.On the basis of summarizing the geological background,metallogenic and ore-controlling pattern of uranium mineralization,this paper defined the prediction factors of uranium mineralization and extracted the prediction factors including uranium deposits buffer zones,alaskite distribution areas,regional tectonic buffer zones,marble exocontact zones,alteration development zones,aerial radiometric uranium anomaly zones and ground gamma spectrometry anomaly zones.Using the comprehensive information geological unit method,uranium metallogenic prediction was conducted and 14 new uranium prospective sectors were delineated in the Rössing mining licence area with approximately 140 000 tons potential resources.This achievement indicated significant uranium potential in the periphery of the Rössing deposit and worthy more exploration efforts.The 5 predicted level-A prospects are the focus for the next exploration.Among which,the A1(Z17-19)sector has been verified as a super-large uranium deposit through drilling,demonstrating remarkable prospecting achievements.关键词
白岗岩型铀矿/潜力评价/预测区圈定/罗辛铀矿床Key words
alaskite-type uranium deposit/potential evaluation/Rössing uranium deposit/Namibia分类
地质学引用本文复制引用
何德宝,范洪海,耿瑞瑞,陈金勇,王勇剑,陈东欢,陈旭..纳米比亚罗辛矿区铀成矿潜力评价[J].世界核地质科学,2025,42(2):291-306,16.基金项目
中核集团自主研发项目罗辛矿区及外围资源扩大研究(编号:地SD05) Supported by CNNC Self-Developed Project,Research on Resource Expansion in the Rössing Mine and its Peripheral Areas(No.地SD05) （编号:地SD05）
